Method of finishing spinning rings



LE nov a.. FRASER. METHOD 0F FINISHING SPINNINGRINGS.

` lAPPUI-:MIMI FILED IUIIE Il. 1920. 1,437,234. Patented Nov. 28,1922.

2 SHEETS-SHEET my Ms' REX LE RO-Y B. FRASER.

METHOD 0F FINISHING SPINNING RINGS.

APPLICATION msu JUNE 1|, 1920.

1,437,234. Patented Nov. 28, 1912.2.`

` 2 SHEETS-SHED 2.

Patented Nov..4 28, 1922.

ENT OFFICE;

LnnOYB: FRASER, orNnw-'nhvnm ooivivno'rieur.

METHOD or rrnrsnrne srrNNrNe eines.

application' flied runeA 11,

Be it kknown that I, LEROY B': FRASER, a citizen ofv thev United States', residing at New Haven, in the county ofNew Haven andV State of Connecticut, havel invented a certain new and useful I-inprovenientl inVv Methods of: `Finishing Spinning Rings, ofv which the followingy isa full, clear, andintact'y description. l Y

This' invention relates tov` a method of finishing spinning; rings,vr andf is particu* larly adaptable to' spinningV rings of'` sheet metal of the typev disclosedv in;Y application Serialv No. 346,402, filed` December 20,1919, covering a process of producing such rings. u j n Spinning rings of, sheet nietal of they general type referred to thel application above mentioned' have ,many4 advantages, from a. practical as well as an econonncal standpoint, over spinning' rings which' are formed of'c'ast" Inetal Sheet inetal'spiiining j rings, however, are more" or less liable to distortion, which interferes seriously with the performance of. their functions, and accordingl'y it has been considered necessary to subject these rings tok some hardening process, whereby they will maintain their shape, both `duringthe process ofzrnanufacture and the subsequent use off the ringl in the` performance of; its` usuall functions,

Spinning rings' of sheet metal'are, inA ad-` dition to thel hardening process', subjected ordinarily to a polishingprocess which` ini parts; to' therk surfaces of the ring a higher finish, thusadding to the appearanceofithe ring, and additionally'` presenting to the traveler. a sinooth and. polished surface, which' results. in. reducing the friction. between the travelerv and the ring, and' there".-y by increases'the speed of the' traveler which is the desirable result in spinning.

The present invention has` for onejofits important Objectsk an'iinpro'ved niethod of finishing spinning ringsof thetype referred to,'and of other types, through a series; of steps which effects the polishing of the ring in a highly etlicient rnann'er'. f

'Preferably, the ring,..duringf an intermediate stage of its manufactureand before the flange is bent into the required re'- lation to the base of the ring toforin. an inclinedv rac'ew-ay, is successively subjected to the action of suitable polishing tool-s to 1926'. serial nos ass-,286.

ture; By proceedingin the orderofv stepsherein enumerated, the ring may be pol ishedfve'ry'f successfully, and the inner and outer faces ofthe raceway flange andthe u'ppv r` surface ofthe baseof the ring, will receiveL` av high gloss or polish, which efX-l perinients have shown to Abe of asuperior quality.

In thedfrawings, which illustrate, by way of example, one form of apparatus for carryinginto effect certain steps of the process:

-Figuref 1 is a view in side elevation of a polishing pad', and'one form -of block orl holder' therefor, together with the driving spindle'and frame for supporting theparts Figure 2 is a'y view, in end elevation, of

Thereafter, the ring is the pady and holder, taken 'from the left handside off Figure l;

Figure 3f is'I ai vertical 'sectional' view of; thefp'ady and'- holder, shown in Figs; l and 2,'qtogether` with the driving spindle;`

- Figure /i is-i an end elevation, and

Figure' 5- is a sectionalview, of a niodified forni ofholder forvan abrasive pad;

Figure (iis a sectional detailkk view of" a partially formed spinning ring, in condi! tion to be subjected to the polishing process;

Figure 7 is a sectional detail view ofthe ring, coinpletely iinished as toits forrn by the bending of the flange intol angular relation to the base;

.Figure 8 isa longitudinal sectional view of a chuck forholding the ring in position for polishing,- together with the polishing pad and its holder; and j- ,I

YFigure 9fis a side-elevational'y view of the chuck shown in Figure 8'.

In manufacturing sheet nieta-l spinning rings of the type'described in the application above referred to and as shown in Figure 7 of the drawings of the present application, a sheet niet-al blank is subjectedVV to the action of suitableV dies, which press the blank,

through successive stages, into the form of a finished spinning ring which comprises a base portion 21, and an inclined flange 22 constituting a raceway for the traveler". As heretofore explained, spinning rings of this type should be subjected to a suitable hardening process to enable them to maintain their shape under all conditions oi manufacture and use. Under the present process, the blank troni which a ring is to be iormed is brought, by successive stages, into the condition shown in Figure 6 of the drawings, wherein the flange 22, which is subsequently bent into such relation ot the base as to form an inclined raceway, extends at right angles to the base. lWhile the flange extends in such relation to its base the topo't said base and the lace ot ilange 22 towardsv the base are soft polished by presenting these suriaces to a suitable pad of felt, or similar material, carrying on its surface an abrading material, suiiiciently coarse to remove all scratches, etc. The ring is then flared, as shown in Fig. 7, and the under surfaces oi' the base 21 and the folded edge are soft polished. After being so treated, the ring is hardened, and its top, bottom, and folded portions are presented to a polishing pad whose` surface carries an abrasive material which is preferably liner than that used during soft polishing, to bring out the necessary finish.

Referring to Figure 1 of the drawings, which illustrates one form ot apparatus for applying the abrasive material to the surtace of a ring, a suitable base 14 carries standards 10, 12, which sustain bearings for a rotatable spindle 7, having thereon fast and loose pulleys 9, 9. One end portion of the spindle 7, passes through, or is otherwise rigidly secured to a block 1 of wood, or of layers of leather. This block is provided with an annular recess which receives a ring 3 of felt, or other suit-able material, to the outer face of which is appliedthe abrasive material for polishing the ring. Under one proposed method ot' procedure, the ring is held in contact with the tace of the pad 3, while .such pad is rotated at a high speed, through suitable power applied to the pulley 9, and the flange 22 of the ring will either form a circular groove 5 in the face oi' the' pad 3, or will enter a previously formed groove therein, and the face portion of the felt pad and the walls of the groove will engage and polish the surfaces of the flange 22 and base 21.

Under another form of the invention, the spindle 7 for the pad car 1ying the abrasive element has secured to its end a disk 7a, which is provided with an annular recess toreceive the felt pad 3. Adjusting screws 17 engage an annular plate or washer 20 at their inner ends, and serve to move the pad 3 forward the required distance to cause said pad to bear firmly against the surface of the ring to be polished, the screws 17 affording means to adjust the pad to compensate for the wear upon its outer face. Suitable nuts 18, 19, are provided i'or the purpose of imparting movement to the screws 17 and for locking such screws in adjusted position.

ln Figures 8 and 9 of the drawing is illustrated a chuck which is particularly constructed for holding a spinning ring ot the character shown in Figure 6, and of presenting such to the polishing pad 3, which is carried by the holding block 1 at the end of the spindle 7. The numeral 2S represents thc spindle ol a lathe, which spindle is provided near one end with external screw threads 30, which engage internal threads of a contracting chuck member 32, whose outer tace is provided with a recess, whose outer wall is beveled,y as indicated at 33. `An inner contracting member 34, is received within the recess formed in the face of the `member 32, the contracting member E4-being provided with a plurality of radial slits 40, and said contracting member having a stem portion 24 which is formed tapering at 26, to engage an inner tapering surface formed at the end of a recess in the spindle 28. The outer face of the chuck member 34 is provided with a counter-sunk groove 41, within which is seated the base portion 21 of the spinning` ring to be polished. By turning the chuck member 32 upon the threads 30 in a direction to cause said member to movek towards the right in Figure 8, the tapering surface 33 will engage the outer tapering tace 36 of the chuck member 34, thereby contracting said member so ythat it will be caused to grip the periphery ot the base 21 of the ring, thereby holding the ring rmly durino the polishing process, so that the centritugal force which is imparted to the ring, due to the high rotation of the spindle 281 does not torce the chuck to expand and permit the ring to be disengaged from said chuck.

l/Vith the construction illustrated in Figure 8, the spindle 2810iE the lathe is rotated at a high speed, thereby rotating the ring while in engagement with the polishing pad 3. At the same time, if desired, the spindle carrying the polishing pad may also be rotated at a suitable speed and in a direction which is opposite to they direction of rotation of the ring, and by rotating the ring and pad in opposite directions a high polish may be imparted to the ring, in a very short time.

It will be understood that changes may be made in the details of construction or in the relative arrangements of the parts of the apparatus herein shown and described` and furthermore that the process may be carriedout, as to the polishing steps, by

other forms of apparatus than those herein disclosed.

What is claimed is:

l. The method of finishing spinning rings, which comprises partly forming a ring with a base and an angularly projecting racevvay flange, subjecting the partly formed ring to the action of a polishing memberfor removing the scratches and defects, suitably hardening the ring, and thereafter subjecting said ring toa second polishing process.

2. A method of finishing spinning rings, which comprises partly forming a `.ring kof sheet metal with a base and an angularly projecting raceway flange, preliminarily subjecting certain portions of such ring to the action of a polishing member, bending said flange at an acute angle to saidbase,

thereafter polishingv other portions of the ring then subjecting the ring to a suitable hardening process, and -nally subjecting the rings to another polishing action to impart a finishte its surface. f

3. Themethod of finishing spinning rings of sheet metal which comprises, partly forming a ring With a base and' an upstanding racevvay flange, subjecting certain parts of such partly formed ring to a preliminary polishing process to remove the defects from the surface of' thering, bending the raceWay into an inclined relation to the base, suitably hardening the ring to enable it to maintain its shape, and thereafter subjecting the ring to a finishing polishing` operation.

yIn testimony whereof I have hereunto set my hand this 26th dav of May A. D. 1920.

LE ROY B. FRASER. 

